Post-war, Zamperini struggled with PTSD and alcoholism before a religious conversion led him to forgive his former captors, eventually returning to Japan to meet some of them.
A book titled Unbroken: A Journey from Silence to Strength which explores personal growth and overcoming silence. Unbroken
Zamperini and two fellow crewmen survived 47 days adrift on a life raft, battling sharks, starvation, and strafing from enemy aircraft. and strafing from enemy aircraft.